diag: Modify socket and rpmsg debug information output

Due to small buffer size and increased peripheral information and
associated socket and rpmsg information, output of socketinfo
and rpmsginfo in debugfs is not proper. Modified the way debug
information is output to make use of small buffer.

Change-Id: Ie39a5ca8e1c1ef53b7e77ec44c77fe5c6706f2a1
Signed-off-by: Manoj Prabhu B <bmanoj@codeaurora.org>